@@ -42,45 +42,45 @@
 /**
  * \brief Creates a new set.
  *
  * \return A new, autoreleased set
  */
-+ set;
++ (instancetype)set;
 
 /**
  * \brief Creates a new set with the specified set.
  *
  * \param set The set to initialize the set with
  * \return A new, autoreleased set with the specified set
  */
-+ setWithSet: (OFSet*)set;
++ (instancetype)setWithSet: (OFSet*)set;
 
 /**
  * \brief Creates a new set with the specified array.
  *
  * \param array The array to initialize the set with
  * \return A new, autoreleased set with the specified array
  */
-+ setWithArray: (OFArray*)array;
++ (instancetype)setWithArray: (OFArray*)array;
 
 /**
  * \brief Creates a new set with the specified objects.
  *
  * \param firstObject The first object for the set
  * \return A new, autoreleased set with the specified objects
  */
-+ setWithObjects: (id)firstObject, ...;
++ (instancetype)setWithObjects: (id)firstObject, ...;
 
 /**
  * \brief Creates a new set with the specified objects.
  *
  * \param objects An array of objects for the set
  * \param count The number of objects in the specified array
  * \return A new, autoreleased set with the specified objects
  */
-+ setWithObjects: (id const*)objects
-	   count: (size_t)count;
++ (instancetype)setWithObjects: (id const*)objects
+			 count: (size_t)count;
 
 /**
  * \brief Initializes an already allocated set with the specified set.
  *
  * \param set The set to initialize the set with